Tell everyone if the duration of an event changed.
Tell everyone if the duration of an event changed.

svn path=/branches/KDE_3_3_BRANCH/kdepim/; revision=346161

lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi,lefou/kdepim-noakonadi